From whole-of-home sediment + carbon filtration to under-sink reverse osmosis for drinking water — we design and install custom filtration to suit your water quality.
A whole house water filter in Sydney is installed where the mains enters the property and usually combines a sediment stage with a carbon stage to reduce chlorine, chloramine and particles at every tap and shower. AHHAC starts with a free water quality test, then specifies only the stages your water needs, adding reverse osmosis at the kitchen tap or UV for tank water where required. Sediment cartridges typically last 6 months and carbon cartridges 12 months.
Reviewed by the AHHAC Technical Team — licensed plumbers & hydronic engineers, NSW Lic 262528C.How we write & review
We start with a free water quality test (TDS, pH, hardness, chlorine, heavy metals if needed). Based on results we recommend the right combination of sediment, carbon, RO, UV, and softening stages.
Whole-home systems install at the mains entry; under-sink systems serve the kitchen tap; bathroom systems address chlorine for skin and hair.
A whole house water filter treats everything that comes through the mains, which means it also sits in the path of every shower, toilet and hot water unit. Get the sizing or location wrong and you will feel it as weak showers long before you notice better-tasting water. These are the decisions we make after the free water test and before we cut into the pipe.
Water quality decides the stages. Sydney mains are moderately hard, so homes with glass shower screens or a continuous-flow unit sometimes benefit from scale reduction, while Melbourne's softer water rarely needs it. Chlorine and chloramine are the usual complaints, and sediment plus carbon handles both. A whole-home system will not remove fluoride or dissolved salts; if that is your goal, a reverse osmosis unit on the kitchen tap is the right tool.
Who does it not suit? If your only concern is drinking water taste, an under-sink system is cheaper and simpler. Renters need the owner's consent, because the filter is plumbed into the main. Homes on tank water need a different approach, usually sediment filtration plus UV sterilisation, and our rainwater harvesting and water conservation page covers the tank side. If you are replacing hot water at the same time, read our continuous-flow hot water guide, since filtration and the heater are best sized together, or browse every plumbing service we offer.
Written from on-site experience by the AHHAC Technical Team.
AHHAC's in-house design and service team — licensed plumbers and hydronic engineers (Lic 262528C) who have designed and installed 2,400+ hydronic heating, cooling and hot water systems across Australia since 1998.
Every plumbing and hot water job is assessed on site, carried out by our own licensed plumbers and gasfitters to AS/NZS 3500 (plumbing) and AS/NZS 5601 (gas), pressure-tested and documented, and backed by ongoing service. Nothing is subcontracted out.
Sediment, chlorine, chloramine, heavy metals (lead, copper), microplastics, some PFAS. Doesn't remove fluoride or salts — for those, you need a reverse osmosis system on the kitchen tap.
Depends on your water hardness. Sydney mains are moderately hard; Melbourne is soft; some regional areas (especially bore water) are very hard. We test for free and recommend only if needed — softeners aren't always required.
Sediment: 6 months. Carbon: 12 months. RO membrane: 2–3 years. UV bulb: 12 months. We offer service contracts that schedule and supply the right replacement filters automatically.
"AHHAC delivered our 22-zone underfloor system on time, on budget and to spec. The crew were tidy, the documentation was thorough, and the commissioning was textbook."
"We've worked with AHHAC for 17 years. They've installed and serviced our hot water plant across three commercial buildings — and they pick up the phone on weekends."
"Three mobs quoted us; AHHAC's design was the only one based on a proper heat-loss calculation. The system runs beautifully — the others would've been oversized and expensive."